#include <stdio.h>

struct weapon{
    int price;
    int atk;
    struct  weapon *next;
};

int main(){
    struct weapon a,b,c,*head;
    a.price = 100;
    a.atk = 100;
    b.price = 200;
    b.atk=200;
    c.atk = 300;
    c.price = 300;
    a.next = &b;
    b.next = &c;
    c.next  = NULL;
    head = &a;

    struct weapon *p;
    p = head;
    while(p!=NULL){
        printf("%d,%d\n",p->price,p->atk);
        p = p->next;
    }
    return 0 ;
}